Developed by the pharmaceutical company Pfizer, Viagra is used to treat both male erectile dysfunction (impotence) and also pulmonary arterial hypertension (PAH).

Viagra is a little blue pill and has become the stuff of legends, but there's no doubt that they are effective for many men. If you are experiencing difficulties in this area, you should always speak first to your doctor, to be sure that you have explored all possible avenues of treatment before taking Viagra pills.